文献类型：期刊文献

英文题名：Construction of alumina framework with a sponge template toward highly thermally conductive epoxy composites

作者：Wu, Xian Liu, Wei Yang, Le Zhang, Chun

第一作者：吴鑫

通信作者：Zhang, C[1]|[14440f6a6d277849ce3bf]张纯;

机构：[1]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2024

外文期刊名：POLYMER ENGINEERING AND SCIENCE

收录：;EI(收录号：20240815612174);Scopus(收录号：2-s2.0-85185501434);WOS:【SCI-EXPANDED(收录号:WOS:001160581400001)】；

基金：We thank the support from National Natural Science Foundation of China (52263004, 51863003), Research start-up Foundation for Advanced Talents of Guizhou Institute of Technology (grant number: XJGC20190668), Guizhou Provincial Science and Technology Projects (QianKeHeJiChu-ZK[2022]YiBan179), and Research Institute Service Enterprise Action Plan Project of Guizhou Province (No. [2018]4010).

语种：英文

外文关键词：alumina; interfacial thermal resistance; polyurethane foam; thermal conductivity

摘要：Ceramic-based polymer composites are commonly utilized as thermal management materials due to their high thermal conductivity and electrical insulation properties. One efficient method to enhance the thermal conductivity of these composites is by constructing a three-dimensional thermal conductive network within the polymer matrix. In this study, alumina was coated onto the surface of polyurethane (PU) foam, followed by high-temperature removal of the PU foam and sintering of the alumina sheets to obtain a continuous alumina framework. Epoxy resin was then infiltrated into this alumina framework to fabricate highly thermally conductive EP/f-Al2O3 composites. The EP/f-Al2O3 composite achieved a thermal conductivity of 2.44 W m-1 K-1 when the filler content of 26.8 vol%, representing a 400% improvement compared to EP/Al2O3 composite with randomly dispersed fillers, and a remarkable 1180% enhancement compared to epoxy resin. Infrared thermal imaging also confirmed the excellent heat dissipation capability of the EP/f-Al2O3 composites. Overall, this research presents an effective method for producing highly thermally conductive and electrically insulating composites that can be used in electronic thermal management applications.Highlights Fabrication of porous Al2O3 frameworks/epoxy composites. Porous Al2O3 frameworks were fabricated by polyurethane foam template. The obtained EP/f-Al2O3 composite exhibited excellent thermal conductivity. The preparation process of EP/f-Al2O3 composite for thermal conductivity materials. image